The RoentDek FAMP8c pulse

The RoentDek FAMP8c is an 8-channel amplifier with 50 Ohm impedance for high pulse as obtained from micro-channel plate detectors, certain read-out anodes (e.g.. delay-line) and various kinds of secondary electron (photomultiplier, channeltron, etc.). In its standard version it is similar the older RoentDek FAMP8 module, but can be modified for different bandwidth and requirements, also a BFAMP8 version for producing bipolar output signals (for direct operation with the RoentDek cTDC10) is available.

The 19” rack mount case (one height unit) hosts 8 individual bipolar amplifiers with a bandwidth of typically 80 MHz (channel 7 and 8: 120 MHz) via an AC-coupled input (50 Ohm impedance, lemo00 connector) and both inverting/non-inverting outputs. The nominal amplification factor is about 50 and can be adjusted between 20% and 180% with potentiometers on the front panel. The maximum linear output signal height is approx. +/- 1.5 V. Amplification of inverting and non-inverting output may differ within 10%.*

The unit has a consumption of about 25 Watt (2 A at +12 V) and is equipped with an over- temperature protection. It comes with an external power supply for 100-250 V AC (50-60 Hz) mains power.

Size (approx.): 484 mm x 45 mm x 167 mm (width x height x depth, Insertion depth including power connector: 230 mm), Weight: 1400 g (without power adapter)

The FAMP8c is especially suited for signal amplification of all RoentDek delay-line detectors with RoentDek FT12(16)TP (or similar) signal decouplers.

It can be used for detector readout in combination with a constant fraction discriminator (e.g. RoentDek CFD8c) and timing digitizer (e.g. RoentDek TDC8HP) or with a fast ADC system (e.g. RoentDek fADC8).

* Input impedance may slightly vary when amplification is altered.